I have a Cumana controller which was built by Jean B. from CEO.
I have random I/O errors with it (for example, I have an error on a file, I reset the board and the error disappears).
Fabrice F. suggested it might be a Power problem. I use an ATX PSU from a PC. The board is powered through a classical IDE hard drive power connector and the disk drive by a classical disk power connector.
Here are some photos of the board and the setting.


On the CEO forums Didier (coco.oric here) suggested that I might need to power the Atmos with his own 9V PSU as well.
Is this risky for my Oric ?
Any other suggestions ?
Thanks a lot in advance,
Patrice
Edit: just in case someone wonders, the controller card bottom is protected with a card board (it is not in contact with the carpet).